Legacy Fat EQ in Logic Pro for Mac

Fat EQ is a versatile multiband EQ that can be used on individual sources or overall mixes. Fat EQ provides up to five individual frequency bands, graphically displays EQ curves, and includes a set of parameters for each band.

If you’re new to using plug-ins in Logic Pro, see Add, remove, move, and copy plug-ins in Logic Pro for Mac.

Figure. Fat EQ window.

Fat EQ parameters

  • Band Type buttons: For bands 1, 2, 4, and 5, click one of the paired buttons to select the EQ type. Band 3 is parametric.

    • Band 1: Click the highpass or low shelving button.

    • Band 2: Click the low shelving or parametric button.

    • Band 3: Always acts as a parametric EQ band.

    • Band 4: Click the parametric or high shelving button.

    • Band 5: Click the high shelving or lowpass button.

  • Graphic display: Shows the EQ curve of each frequency band. The scale is shown in dB.

  • Frequency fields: Set the frequency for each band.

  • Gain knobs and fields: Set the amount of gain for each band.

  • Q fields: Set the Q or bandwidth of each band—the range of frequencies around the center frequency that are altered. At low Q factor values, the EQ covers a wider frequency range. At high Q values, the effect of the EQ band is limited to a narrow frequency range. The Q value can significantly influence how audible your changes are—if you are working with a narrow frequency band, you usually need to cut or boost more drastically to notice the difference.

    Note: For bands 1 and 5, this changes the slope of the filter.

  • Band On/Off buttons: Turn the corresponding band on or off.

  • Master Gain slider and field: Set the overall output level of the signal. Use it after boosting or cutting individual frequency bands.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

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